The kidneys resemble the contractile vacuoles of Amoeba in

Q. The kidneys resemble the contractile vacuoles of Amoeba in

A

expelling out the excess of water

B

expelling out glucose

C

expelling out Urea and uric acid

D

expelling out salts

Solution:

In Amoeba the bubble-like contractile vacuole swells with excess fluid from the cytoplasm.
Its membrane then pumps valuable ions back into the cytoplasm, leaving mainly water in the vacuole.
Contractile proteins surrounding the vacuole then abruptly compress it, ejecting the water out of the cell through a pore in the cell membrane.
This organelle resembles the kidney by expelling out excess water.

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